Microcentrifuge



FIG. 1 is a perspective view of a microcentrifuge showing my new design;

FIG. 2 is an elevational view thereof showing the side opposite thatshown in FIG. 1;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a bottom plan view thereof.

The ornamental design for a microcentrifuge as shown and described.